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My flat screen suddenly shut off and it wont power on now and when I plug it in theres a high pitch squeal sound

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  • 19 Answers

Must be a damaged plug cable. try taking it to be repaired or try a different power outlet

Posted on Oct 16, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 1 Answer

SOURCE: High pitching sound

buy a new tv

Posted on Jul 26, 2008

  • 71 Answers

SOURCE: sanyo TV buzzing

may be a problem with power supply.

Posted on Mar 08, 2009

  • 67 Answers

SOURCE: No Picture, high pitch sound from speakers

try contacting Vizio @ techsupp@vizio.com

Posted on Jul 27, 2009

  • 4090 Answers

SOURCE: my 52 inch vizio flat screen just shut off. The

Not usually as simple as that!

Try this first leave unplugged for 24 hours then replug and turn on. This is the standard reset.

However it often spells the beginning of trouble beginning.
The fail safe circuit detects overheating on certain components and will shut down to prevent fire, so now never leave it on standby and go shopping or to bed without turning it off.

The power board and the sustain boards have been compromised and some components are in the process of failing or have failed. It is not a DIY due to HTelecvtrocution and radiation risks. Circuit diagrams, special tools and knowledge are required to correctly fix this and re tune it. Unlike PC's board swapping does not rectify the total problem.

Please rate my help++++Thanks for using FIXYA

Posted on May 16, 2010

  • 3 Answers

SOURCE: Emerson LD195EMX wont turn on. When plugged in has

Got the same problem. Foud:
Zener D648, 5V6BSB, was open: Resulting in very high output non regulated voltage
Zener D668, 20BSB, was short, due to the output voltage being too high.

Posted on Dec 18, 2010

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1 Answer

What does a power supply failure on a tv?


??? what does a power supply failure on a tv look like ???


none of the buttons light up , nothing lights up no bars or stripes on screen , nothing !! cord is plugged into a power outlet and is on , but nothing no lights no sound (sometimes a high pitch squeal is heard )

Aug 03, 2016 | Televison & Video

1 Answer

My tv powers on displays the LG logo then makes a high pitched squeal sound from speakers and then flashes on screen (strobe light effect) does not display picture or sound.


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1 Answer

2004 trailblazer ext high beam headlights wont turn off and the relay makes high pitched noise


Need to check the ground path on the squealing relay. A poor ground will cause this condition.

Feb 27, 2013 | 2004 Chevrolet Chevrolet TrailBlazer EXT

2 Answers

High pitched squeal when starting car


Sounds like a belt, and possibly the one on the power steering pump which may be the sepentine belt. Could be caused by power steering pump pulley resistance or the belt tensioner bearing. Try a visual check with motor running. Be careful of moving parts!

Jun 06, 2012 | Charging & Starting Systems for Lexus...

1 Answer

5 year old goodmans tv suddenly went off, then intermittent high pitched squealing noises


Check the horizontal output section circuit. It sounds that the LOT {Line Output Transformer} has damaged.

May 11, 2012 | Televison & Video

1 Answer

When i plug the tv in, i get a high pitched sound


It seems that your unit has some sort of PSU fault, or a problem that is shutting down the Power Supply Unit, PSU. This happens so that no further damage, and possible fire will occur.
You need to take the unit to a reputable service centre/man and ask for a firm "Quote" for the work to be done. It is that "sound" that gives it away, this is a typical switchmode Power Supply problem

Mar 06, 2010 | Televison & Video

1 Answer

Toshiba Regza bought 1/28/08 makes squealing noise


It's in the repair shop. I'll write back what the problem was and how much it cost to ship.

Oct 07, 2009 | Toshiba REGZA 47HL167 TV

1 Answer

High pitched squeal


Hello, This sounds as if it could be a switching power supply problem or a ballast problem. Both will effect your power supply and cause malfunction in various subsystems (audio, screen control, control systems, and the like). I would suggest having a qualified TV repair technician look at the set. This is because there are no user servicable parts associated with this type of problem. I hope this helps, Thank you, Shuttle83 http://www.electron-age-technologies-llc.com

Jun 10, 2009 | Polaroid FLM-3734B 37 in. LCD HDTV

2 Answers

CTR Television will not power up


What has happened is that the horizontal output transistor has shorted. The squeal you hear is the power supply running under a heavy load. The picture narrowing or being distorted indicate that the horizontal output was not operating clean. Something in the output section was not as it should be. Possible short in the output transformer/tripler unit or something loading down the secondary voltages generated by the horizontal output. You will need a tech to figure this out....If you are not a tech, then this ones a goner as far as fix it at home goes.....If you are a tech I might be able to talk you through the repair. Have someone remove the horizontal output transistor and I bet the squeal goes away.

Feb 10, 2008 | Televison & Video

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